langerfeld



(No Model.) 3 Sheets-Sheet 1.

A. LANGERFELD.

HYDRAULIC EMBOSSING MACHINE.

No. 453,410. Patented June 2,1891.

w: NDRRIS PETERS co, mom-umo.,'msumemu, n. c.

(No Model.) 7 3 SheetsSheet 2.

A. LANGERFELD.

' HYDRAULIC EMBOSSING MACHINE.

Patented June 2,1891.

W 76661906 rvu 677/507 3 Sheets-Sheet 3.

(No Model.)

A. LANGERFELD, HYDRAULIC EMBOSSING MACHINE. No. 453,410.,

Patented June 2,1891.

WWI/III,

' UNITED STATES PATENT OFFICE.

ARTHUR LANGERFEL D, OF NEIV Y ORK, N. Y.

.VVHYDRAULIC EIMIBOSSING-MACHINE.

SPECIFICATION forming part of IhettersPatent No. 453,410 dated June 2,1891.

Application filed February 10,1890. Serial No. 339,961. (No mo'lelJ Toall whom it may concern:

Be it known that I, ARTHUR LANGERFELD, a citizen of the United States,residingin the city, county, and State of New York, have invented a newand useful Hydraulic Embossing-Machine, of which the following is aspecification.

My invention relates to improvements in machines for embossing, forming,or pressing sheet-metal shells and tubes, by the direct pressure ofwater or other fluids, and several of the new features of this machineare also useful for other purposes.

The objects of my invention are, first, to provide a water-tightconnection between the shell or tube to be embossed and the watersupply,so constructed that the rim or neck of the shell or tube willnot befirmly held or clamped, as is the case in machines of this kind nowused, but so that the neck of the shell or tube can slide and besufficiently drawn into the die to supply metal for filling out thecavities in the die without stretching and weakening the metal as muchas it is when firmly held at the edge; second, to provide a die-holdingpress having a long and quick motion to open and close, so that work canbe put in and taken out quickly;'third; to provide a mechanism by whichthe die can be opened enough to take the finished work out and put ablank in without taking the whole die apart or out of the die-holder;fourth, to provide die-holders so constructed that they will compressthe sections of the die concentrically, so as to firmly close the seamsbetween the sections; fifth, to provide dicholders so arranged that diesof diiterent lengths and sizes can be put in; sixth, to provide meansand connections for bringing different pressures to bear both onthe diesby means of a press and on the work in the dies to suit different sizes,kinds,-and thicknesses of metal. I attain these objects by themechanisms and means illustrated in the accompanying drawings, in whichFigure l is a general view of the machine, partly shown in section. Fig.2 is a plan showing asection above the platen of the press. Fig. 3 is aplan of the die-holders and dies. Fig. at is an enlarged verticalsection of the die-holders, dies, plug with connection, and

mechanism for opening the die. Fig. 5 shows the die-holders, dies andconnections for long tubes, and arrangement of screw when the ram is toosmall to be bored out to receive the screw. Fig. 6 shows the sections ofthe die provided with guides in the die-holder. Fig. 7s hows a die in asingle die-holder in section. Fig. 8 is a central cross-section of thetubedies and tube-dieholders shown in Fig. 5.

A B O D E, Fig. 1, is an ordinary hydraulic press, A being the cylinder,B and 0 columns or rods, D the head, and E the ram.

F is an extension of the ram E outside of 'the cylinder A.

G is a sleeve or support resting 011 the top of the ram E on a bearingK, so that the sleeve Gcan revolve.

Y is a key and slot to keep the ram E from being revolved, so as not towear the packing A unnecessarily. There is also a vent-hole at Y to thebore in the ram E to allow the air to escape when the screw I descends.

On the sleeve G is a nut H.

I is a screw fitting into the nut II, and is fastened under the platenL.

M and M are guides attached to the platen L and sliding against thecolumns 13 O or other guides, as shown in Fig. 2, so that the platen Land screw I cannot be revolved, but will be moved up or down when thenut H is revolved to the right or left, respectively.

The ram E, as shown in Fig. l, is so proportioned as to be large enoughto admit of being bored out, so that the screw I can enter it whendescending. This arrangement is desirable because it makes the pressshorter, but it is not necessary that the ram E should be hollow. henthe ram E is so proportioned as to be too small to be bored out largeenough to admit the screw I, then the sleeve or support G is made asmuch longer or higher as is necessary to give the screw I room todescend without entering the ram E, as is shown in Fig. '7, or the partF of the ram may be made long enough to receive the screw; but it isgenerally preferable to lengthen G. The objects of the screw I are toimpart a quick and sufficient travel to the platen L to make roombetween the head D and platen L, so that the blank shell W can be putinto the die U or taken out when finished and the die quickly raised upto the head D after the blank shell W has been put in without using theslow-moving ram E.

J is a gear-wheel to drive the nut H.

N is a pinion to drive the gear-wheel J. The face of the pinionNis madewide enough to give the gear J room to move up and down as much as theram E without becoming disengaged.

Motion is imparted to the pinion N by the shaft 0, onto which it isfastened. This shaft 0 is provided with suitable means for being drivenby bevel-gears 40, as shown, or by a pulley direct, as may be mostconvenient.

The counter-shaft X must be provided with means for being driven to theright or left or stopped. As any of the means commonly used for thispurpose will answer, they are not shown in the drawings.

The screw I is stopped when nearly all the way up or down by themechanism carried by the rigid immovable frame 11 b b b, Fig. 1, andconsisting of the following parts: a a is astiff arm attached to theplaten L or head of the screw 1. cc is a rod sliding vertically in theframe I) b b b, with a slanting step or bend d in. it made to act as acam. e and e are collars adjustable on the rod 0 c. h is a lever withcounter-weight h in equilibrium with the rod 0 c and collars e 6 so thatthis rod 0 0 will move equally up or down and remain where left. j is aweighted lever or pawl with a tooth j at its weighted end. The weightsmaybe substituted by a spring. The tooth j fits into the notch i in theslide f f Z is a handle connected with j, so that the pawl j can beraised up out of the notch 71 when ff is to be shifted. The slide ff isconnected with the shifter of the above-mentioned means for driving orstopping the countershaft ac, (not shown in the drawings,) so that whenit is in a position to receive the pawl j in the notch i thecounter-shaft a: will be stopped, and when shifted to f on f by thelever k the counter-shaft as will be driven to the right or left,respectively, and thereby cause the nut H to revolve and raise or lowerthe screw I. hen the screw I is running down, the roller Q will be whereindicated by the dotted circle g", and when the arm a a has reached thecollar e and moves the rod 0 0 down 9 will be pushed back to g and stopthe screw I, as described. WVhen the screw I is running up, it isstopped in a similar manner by means of the rollerg'.

Other automatic stop mechanisms may be substituted for this one, butthis one is especially adapted for this machine because it allows theheavy nut 11, sleeve G, gear J, pinion N, and shafts O and X, to runafter the power driving them has been stopped, until their momentum isexhausted, and any additional motion will not continue to shift theslide f f because the rollers g or g will have passed the bend (Z in therod 0 c.

The platen L carries a die-holder S S S, and under the head D a similardie-holder Q,

Q is fastened. Each die-holder has a conical bore P T, Fig. 4. Thedie-holders are made in sections S S S"and Q Q,or more, so that by usingmore or less sections dies of different lengths can be putinto the pressand the conical bores in the die-holders are provided with bushings I P"P and T T", so that different sizes of dies may be put into the samedie-holders by inserting more or less bushings. Each section of thedie-holders has a shoulder 45, fitting into a recess 46 in the nextlarger section, so that all sections remain flush or centered and thestrain upon one is partly transferred to the next larger one and to theplaten L by the largest one. The sections of the die U are made with twoopposite conical external faces or bearings U U, corresponding to andfitting into the conical bores of the die-holders S S S and Q Q, or intothe bushings putinto thedie-holders. The object of these conical bearings is to cause the seams between the sections of the die to be tightlyclosed, so that they will not show in the work as much as they do whenthe dies are not so compressed.

When the shape of the die is such that the upper part cannot beconveniently provided with a sufiicient conical hearing, I make the topof the die flat, as shownin Fig. 7, and provide a Hat surface 40 underthe head of the press D in place of a second die-holder for the top ofthe die to bear against, and thereby press the sections of the die intothe conical bore P, so that the seams in the die will become firmlyclosed. The object of the separate bottom block V, Fig. 4, is to carrythe pressure on the bottom of the work NV without putting this strainonto the sections of the die U, which would be subjected to a tension ortearing strain if the bottom were made part of the sections. Thisarrange ment is of special advantage when the dies are made of a metalor material which has a great crushing resistance-as, for instance,cast-ironbut a low adhesive strength or resistance to tearing andbreaking. Byproviding this bottom block V with a plain recess V, asshown in Fig. 4, difierent bottom dies V" can be put in, so that withthe same dies for the sides different bottoms can be formed on theshells. I

22 to 27, Fig. 4, is a mechanismin the platen L for raising and therebyopening the die W. It consists of the upright screw 23, nut 24., andcrank-handle 25, geared to the nut 24. The screw 23 has a keyway 26 cutlengthwise, and is keyed to the platen,as shown in Fig. 2, so that thescrew 23 cannot revolve, but will rise or descend when the nut 24 isturned to the right or left, respectively, by means of the crank-handle25.

20, Fig. 4, is a plug fitting into the neck of the shell \V. This plug20 is provided with a hydraulic packing 21 at or near its end, andthrough the plug 20 is a water-passage 44, connecting the passage 19with the inside of The bottom edge of the plug 20 the shell IV.

D, together with the shell W.

is rounded a little, so that the shell will slip over itwithout catchingon the corner. It is desirable to give the top rim of the shell W aslight flare, as shown, so that in case it is a little out of shape orout of center it will'center itself and slip onto the plug 20 withoutstriking it on the edge. either be fixed under the head of the press D,as shown in Fig. 1, so thatthe shell W will slip onto it, or it may beput into the neck of the shell WV and raised up against the head In thiscase the plug is provided with a shoulder 42, Fig. 4, resting upon thetop of the shell W; or if the shell is not strong enough on part of thedie U the plug is also provided with a connection 43 to form a tightjoint between the passage 19 and the passage 44 through the plug. Forsmall accurate work the former is preferable; but for large irregular orrough work it is generally safer to put the plug into the neck of theshell W, instead of fastening it to the head D. The end of thewater-passage into the shell W is closed by a light spring-Valve 18 tokeep the water from emptying out of the passage 19 andtube 14 when theshell W has been withdrawn from the plug 20.

The blank shell W is made with a cylindrical or parallelopipedprolongation of its upper end or neck WV, and the die U has a smoothcylindricalorparallelopiped collarU at or near its top end closelyfitting around the neck W, which is made long enough to allow for beingdrawn down into the die when the shell W is being embossed. I prefer tomake the collar U separate of hard steel,

the dies being made of a cheaper metal or material; but the collar mayalso be made part of the dies at or near the top ends of the sections,the parts being pressed together into a whole when the dies are pressedtogether. The plug 20 must be made of such a length that the hydraulicpacking 21 will come just inside of the collar U so that the neck W ofthe shell can slide down between the collar U and packing 21 withoutbecoming expanded or distorted. The packing will then remain tight whilethe shell is being drawn into the die to supply metal to fill out thecavities in the die without overstraining the shell WV and causing it totear or become too thin in places.

we is an ordinary weighted accumulator.

n is a hydraulic force-pump, (shown only in part,) and p is thesupply-tank for this pump. The pump at is connected with the accumulatorm by the pipes r s t.

s is asafety-valve for the pump at as a precaution.

The cylinder A of the press is connected with the accumulator by thepipes c w w 00 J 1 is a pressure-regulator and 2 is a checkvalveinserted to provide against any pressure backing out of the cylinderA incase the This plug 20 may accumulator m should be emptied while a shellis being embossed.

3 is a pressure-gage to indicate the pressure in the cylinder A.

4 is a safety-valve connected with the cylinder A as a precaution.

5 6 7 is an outlet-pipe connecting the cylinder A with the tank 19.

Sis a pressure-multiplier connected with the accumulator m by the pipes9 10 s t and 11 12 10 s t, also to the pump by the pipe 1". The pipe 14and passage 19 connect the pressure-multiplier 8 with the shell W in thedies u, as shown, and the outlet-pipe 13 6 7 connects thepressure-multiplier with the tank 19.

15 is a safety-valve placed between the shell W and thepressure-multiplier 8 as a precaution.

17 is a pressure-gage to indicate the pressplain drawing, forming orembossing dies, the

die-holders, with conic bores S and Q, are removed and the water-supplythrough passage 19 used or not used, as may be required.

hen a tube is to be embossed, a solid plug provided with a hydraulicpacking and resting on the bottom block V is put into the lower end ofthe tube and a collar provided closely fitting the outside of the tubeand placed opposite the packing, all similarto plug 20. The upper end ofthe tube is closed by a plug the same as 20.

hen a tube is too long to be conveniently placed in the press in anupright position, I putit in crosswise, as shown in Fig. 5. Asolid plug43 is put into one end and a plug with water-passage 44 into the otherend, both plugs and surroundings being made similar to plug 20, but heldin place by the cap-pieces 39 and 46 on the ends of the die holders 47and 48. The connection with the passage in plug 44 is formedautomatically by the hollow plunger 33, connected with pipe 14, andfitting and sliding into the cylinder 34, provided with a hydraulicpacking and attached to the plug 44, and connected with plug 44 by thepassage 38. The water-passage in the plunger 33 is closed by a lightspring-valve the same as plug 20, and for the same purpose.

The machine is operated in the following manner: The screw 1 is lowered,as described, all the way down or far enough to give room for openingthe die U and putting in a shell IIO TV. The die U is then opened byturning the crank 25, and a blank shell is put into the die. The die Uis then lowered into the dieholder S S S by turning the crank 25 aroundin the opposite direction, as before, until the bottom block V no longerrests on the top of the screw 23. By dropping into the conic bore of thedie-holder the die closes around the shell IV. The shell W is now pourednearly full of water, space being allowed for the plug 20. The pump isnow run steadily to fill the accumulator m, valve i being opened andvalve 10 closed. Next the screw I is run up all the way, or nearly so,and then valve y is opened, valve 5 being closed. The pressure in thecylinder A will now rise as high as the regulator 1 will permit. Thispressure should be sufficient to firmly compress the die, so as to closethe seams without overstraining it. Valve 10 is now opened, (valve 9being closed.) The water will then enter the shell IV through pipes 1211 14 and passages 19 and at. The regulating-valve l is now thrown outof operation by pushing down the lever 28 and turning down the pawl 29,as indicated on Fig. 1 by dotted lines. shell WV is increased to what isrequired by closing valve 13 and bringing the pressuremultiplier 8 intooperation by slowly opening valve. 9 until the gage 17 indicates thepressure necessary to emboss the shell W. If the pressure does not risehigh enough by supplying the multiplier from the accumulator, valve t isclosed in addition to valve 13, .valves 10 and 9 remaining open. Thefull force of the pump a will now act in conjunction with themultiplierS, and the pressure will rise to the highest point obtainableunless valve 9 is closed sooner. Before valve t is closed theaccumulator should be well filled to keep up the pressure in thecylinder A, and just before valve 9 is closed valve A must be opened orthe pump stopped. Now valve 10 is closed and 13 opened a little. Thiswill slowly let the pressure out of the shell W and multiplier 8. At thesame time valve y is closed and valve 5 is opened enough to let thepressure out of the cylinder A at the same rate as out of the shell W.WVhen the pressures have both been all let out, the screw Iis lowered,thedie U opened by turning crank 25, and the work is taken out. The ramE must be of such a size that it gives more pressure than is exerted onthe largest internal horizontal cross-section of the work in the press,so that the die always remains compressed.

The screw I, nut 11, sleeve G, and the entire mechanism for driving thenut Il may be substituted by other mechanisms or means to move theplaten up and down; but the screw I, nut H, and driving-gears are animprovement answering the requirements of this particular purpose of thepress.

By providing the sections of the dieUwith guides 51, Fig. '7, so as tokeep the sections Then-the pressure in the equally divided, and placinginto the open die a blank shell or tube which is somewhat too large, theblank V will be pressed into the cavities of the die to some extent andsave the metal from being stretched or strained as much in circumferenceas it otherwise would be. I also provide the tube die-holders, Fig. 5,with bushings 50, so that tubes of difierent diameters or dies ofdifferent thicknesses can be put into the same dieholders, and I provideblank blocks 49, to be used when the tubes are not as long as thedie-holders. When the press is large enough, a number of tubedie-holders may be placed in the press together side by side, andsimilarly several shellsWcan be embossed simultaneouslyin a large press.

The pressure multiplier S and pressureregulator 1, I have made thesubjects of separate applications for patents.

What I claim as new, and desire to secure by Letters Patent, is-- 1. Ina hydraulic embossing-machine, the means for connecting the shell ortube to be embossed with a water-supply, consisting of a plug providedwith a hydraulic packing fitting into a cylindrical or parallelopipedneck on the shell or into the end of the tube, the plug having aWater-passage provided with a separable connection with thewater-supply,

substantially as described.

2. In a hydraulic embossing-machine, the combination of a straight orflared neck or parallelepiped prolongation on the upper end of the shellto be embossed, a plug fastened under the head of the press and fittinginto this neck on the shell, a water-passage through the plug connectedwith a water=snpply, a die containing the shell, a collar resting on ormade a part of the die and fitting around the neck of the shell, meansfor holding, raising, and lowering the die, and guides causing the diewith shell to move centrally in line with the plug, for the purpose setforth.

3. In a hydraulic embossing-machine, a cylindrical or parallelopipedprolongation of the blank shell or tube extending outside of the sunkpart of the die, in combination with a plug having a water-passagethrough it arranged to connect the inside of the blank tube or shellwith a water-supply, the plug also having a hydraulic packing at or nearits end fitting into the prolongation of the shell or tube, a collarhaving a smooth inside face closely fitting around the prolongation ofthe shell or tube and placed opposite the packing of the plug, and meansfor holding the plug and collar in their place together with the die,for the purpose set forth.

4. In a hydraulic embossingmachine, in combination with a die forembossing shells or tubes open at both ends, the means for closing oneend, consisting of a cylindrical or parallelopiped prolongation of theshell or tube extending outside of the sunk part of the die, a solidplug having a hydraulic packing at or near its end fitting into theprolongation ICC of the shell or tube, a collar fitting around theprolongation of the shell or tube and placed opposite the hydraulicpacking of the plug, and means for holding the plug and collar in theirplace together with the' die.

5. In a hydraulic embossing-machine, the combination of a plug fittinginto the neck or end of the shell or tube to be embossed, an automaticconnection consisting of a hollow plunger fittinginto a cylinder withahydraulic packing, and a water-passage from theinside of the shell ortube to be embossed through the plug to the hollow plunger and cylinderand from there to the water-supply,substantially as described.

6. In combination with ahydraulic embossing-machine, the lightspring-valve 18 at or near the end of the wafer-passage into the shellor tube to be embossed, for the purpose set forth.

7. In combination with a press, two opposite die-holders with conicalbores or cavities, and sectional dies with opposite conical facesfitting into the conical bores or cavities of the die-holders,substantially as described.

8. In combination with a press, a die-holder carried by the platen ofthe press and having a conical bore or cavity, a sectional die withconical sides fitting into the conical bore in the die-holder, and aflat top surface on the die arranged to bear against the head of thepress, for the purpose set forth.

9. The sectional die-holders consisting of rings or frames resting uponeach other and provided with shoulders fitting into recesses or othermeans for keeping them in position, each section having a conical boreor cavity flush with the bore of the other sections.

10. In combination with die-holders having a conical bore or cavity, thebushings P T, fitting into the conical bores of the die-holders andhaving similar or dissimilar conical bores or cavities, so that dies ofother shapes or sizes can be put into the same die-holders,substantially as described.

11. The combination of a conical bore or cavity in a die-holdercontaining a'sectional die and a mechanism under the conical bore orcavity arranged to raise or lower the die, for the purpose set forth.

12. In combination with a die-holder having a conical bore or cavity,the mechanism for raising and lowering the sectional die in thedie-holder, consisting of the screw 23, fitting into the nut 24, gearedto a crank 25 with a handle, the nut revolving on a bearing 27, and thescrew being kept from revolving by a fixed key 26, fitting into a keywaycut lengthwiseinto the screw, substantially as described.

13. In combination with a hydraulic embossing-machine, die-holders forlong-tube dies, consisting of opposite blocks having semi-cylindrical orsemi-parallelepiped channels closed at each end by cap-pieces, sub"stantially as described.

press, the means for driving the nut H, carrying the screw I of thepress, consisting of a gear-wheel J on the nut H or on the sleeve G,carrying the nut H, a pinion N, in gear with the wheel J, the face ofone of these two wheels being as'much wider than the face of the otherone as the ram E of the press has travel, and the shaft of the pinion Nbeing provided with means for being driven to the right or left orstopped.

16. The automatic mechanism for stopping the screw I of the press,consisting of the rigid frame I) h I) b, carrying an upright rod 0 0,having a bend cl in it arranged to act as a cam and also having twoadjustable collars or projecting parts 6 and c, a stiff arm a (L,extending from the platen L, fastened to the top of the screw I andreaching to the collars e e, a horizontal slide f f, also carried by theframe I) b b b and provided with two lugs or anti-friction rollers g g,so placed that the bend d in the rod 0 cwill strike them and move theslide f f when the arm a a moves the rod 0 c by striking one of thecollars e or e, the slide f f being connected with the shifter of thebelts, or other means by which the nut II of the screw I is driven, allsub stantially as described.

17. The automatic lock of the shifter ff, consisting of thelever j,arranged to stop and hold the shifter f f by means of anotch and tooth,in combination with means for automatically moving the slide ff,substantially as described, and a lever 7.: and connection l, by whichthe slide ff can be unlocked and shifted voluntarily, substantially asshown and described.

18. In a hydraulic embossing-machine, the

combination of a ram arranged to carry or compress a die, and anaccumulator connected to. supply pressure for forcing up and steadilymaintaining the pressure of the ram, substantially as described.

19. In a hydraulic embossing-machine, the combination of apressure-regulator 1, a ram arranged to compress the die, and aconnection from a pump or other water supply through thepressure-regulator to the ram, substantially as shown and described.

20. In a hydraulic embossing-machine, the combination of apressure-regulator, an accumulator, a ram arranged to carry or compressthe die, and a connection from the accumulator through thepressure-regulator to the ram, substantially as shown and described. 21.In a hydraulic embossing-machine, the

IIC

combination of apressure-n1ultiplier 8, a connection from a pump orother water-supply to the pressure-multiplier, and a connection from thepressure-multiplier to the shell or tube to be embossed in the die,substantially as shown and described.

22. In a hydraulic embossing-machine, the combination of apressure-multiplier 8, an accumulator, a connection from thepressuremultiplier to the shell or tube in the die, and a connectionfrom the accumulator to the pressure-multiplier, substantially as shownand described.

23. In a hydraulic embossing-machine, the combination of a pump, anaccumulator, a pressure-multiplier, a connection from the pump to theaccumulator, a connection from the pump to the pressure multiplier, andvalves in these connections, so that the pump can be brought intoconnection with the accumulator only or with the pressure-multiplieronly, the pump being made to give a lngher pressure than that requiredto fill the accumulator, substantially as described, and for the purposeset forth.

21L. In combination with a hydraulic embossing-machine, a water-supplyconnected to the ram E, arranged to carry or compress the die, and aseparate or separated watersupply connected with the shell or tube W inthe die, so that the pressures of these two water-supplies areindependent of each other.

25. In combination with a hydraulic embossing-machine, an accumulator, aconnection from the accumulator to the cylinder A of the press, and aconnection from the accumulator to the shell or tube IV in the die,substantially as described.

26. In a hydraulic embossing-machine, the combination of an accumulator,a pump, a connection from the pump to the accumulator, a connection fromthe pump to the shell or tube in the die, and a connection from theaccumulator to a ram arranged to carry or compress the die, theconnections being provided with valves, so that the pump canbe broughtinto connection with the accumulator only or with the shell or tube inthe die only, or with both, substantially as described.

27. In a hydraulic embossing-machine, the

combination of a pressure-regulator, a pressure-multiplier, a connectionfrom the presstire-regulator to a ram arranged to carry or compress thedie, a connection from the pressure-multiplier to the shell or tube inthe die, connections from the pressure-regulator and pressure-multiplierto a water-supply or to separate water-supplies, and valves in theseconnections, substantially as described.

28. In a hydraulic embossiug-machine, the combination of an accumulator,a pressureregulator, a pressure-multiplier, a connection from theaccumulator to the pressurere ulator,a connection from then'essure-regulater to a ram arranged to carry or compress the die, aconnection from the accumulator to the pressure-multiplier, aconnectionfrom the pressure-multiplier to the shell or tube in the die, and valvesin these connections, substantially as shown and'described.

29. In combination with a sectional die, a separate block or partforming the bottom and having a bearing of its own independent ofthe'other sections of the die, substantially as described, and for thepurpose set forth.

30. In combination with a sectional die, a block under the sectional dieprovided with a recess into which diflerently-formed or differcut sizesof bottom dies can be placed, substantially as described.

31. The combination of a die-holder with a conic bore or cavity, asectional die, and concentric guides between the sections of the die andthe dieholder, keeping the sections equally divided or apart when raisedor lowcred, substantially as described, and for the purpose set forth.

In combination with channeled die-holders for tube-dies, sectionalbushings fitting into the channels in the die-holders and havingchannels similar or dissimilar to the channels in the die-holders, forthe purpose set forth.

33. In combination with channeled die-holders-for tube-dies, blocksfitting into the channel and arranged to fill up the remaining spacewhen the tube-dies are shorterthan the channels in the die-holders, sothat dies for tubes of different lengths can be put into the samedie-holders, substantially as described.

ARTHUR LANGERFELD.

Witnesses:

ISON LUETKE, WILLIAM H. ILGES.

